I am deploying a few DT85GM in Hong Kong, and I am experiencing "SIM Problem" with simcards from Smartone HK.
I first tested the DT85GM with my own personal simcard (PCCW HK) and it worked smoothly, but when Smartone HK gave me 5 brand new sims they all have "sim problem" when the modem was starting up.
I tested the 5 sims in my phone and they appeared to work without problems!
After a lot of trials and things I managed to obtain some older version of sims from Smartone HK and the problem was resolved.
I read on this forum that other user from Taiwan also have sim compatible issues, I am not sure if it is the FW issue, my current FW is 9.08, do you recommend a downgrade?
Is someone currently looking at this issue? Coz my current solution was to use some old simcards, and this is not the best solution I supposed and definitely will be running into again if not properly solved.
Thanks very much for your support